<nz-select [(ngModel)]="selectedArticleSource" [nzPlaceHolder]="placeholder" nzAllowClear (ngModelChange)="selectedArticleSourceChange.emit($event)">
<nz-option *ngFor="let item of articleSources" [nzLabel]="item.displayName" [nzValue]="item">
  </nz-option>
</nz-select>
